Originally posted by alex_read
The RC version of .NET, as with the RC of whistler/XP won't un-install itself after the time has expired, it gives you a messagebox and doesn't let you into windows.

The resolution is to wait until a later version of the OS (RC2 etc) comes out & install this over the top.

In answer to your other question, you can get to a DOS prompt using a windows 98 boot disk. Then type in :
FORMAT C:
Not with NTFS. You need to use a Windows NT 4-5.1 install CD.